Rotary vaned pumps with fixed length and shearing knife-edged va

Details Rotary vaned pumps with fixed length and shearing knife-edged va Rotary vaned pumps with fixed length and shearing knife-edged va

1983-07-13

1985-12-31

Vrablik, John J.

Rotary expansible chamber devices

Working chamber surface expressed mathematically

418181, 418255, F04C 200, F04C 1300

Patent

active

045618348

ABSTRACT:
A rotary vaned pump has solid vanes of fixed length sliding in a boss mounted for rotation about a longitudinal axis eccentrically displaced from the longitudinal axis of the pump chamber, so as to provide respective pump compartments in the pump chamber which vary cyclically in volume and are arranged to pressurize fluid entering the pump chamber through an inlet opening and discharging from the chamber through an outlet opening. Each leading vane edge that passes over the inlet opening is formed as a shearing knife edge that shear-cuts any cuttable solid material in the entering fluid that is engaged by the edge as it enters the pump chamber through the inlet. Such solid material is thereby cut into pieces which can be handled by the pump without jamming rotation of the rotor. The leading edge of the inlet opening is also formed as a knife edge that cooperates with the vane edge to shear the solid material. The vanes slide radially in the rotor boss and their tips engage the rotor chamber cylindrical interior surface surrounding the longitudinal axis, this surface being formed as a specially calculated face cam permitting the use of the solid constant length vanes.

REFERENCES:
patent: 619653 (1899-02-01), Asbury et al.
patent: 746482 (1903-12-01), Evans
patent: 1196977 (1916-09-01), Piatt
patent: 2585406 (1952-02-01), Reynolds
patent: 2974700 (1961-03-01), Waters
patent: 3995977 (1976-12-01), Takahasi et al.

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